Telephone radio transmission



Feb. 11, 1930. K, GANN ET-AL 1,746,646

TELEPHONE RADIO TRANSMISS ION Filed June 1926 311 we "Tot fi'eorge If. awn/1v Lawrence 0. Pain ter [Iowa/ml. tfoh/nson/ Patented Feb. 1

UNITED STATES PATENT OFFICE GEORGE K. GANN, LAWRENCE O. PAINTER, AND HOWARD L. JOHNSON, OF ST. PAUL,

AND PAUL L. FRYKMAN, OF MINNEAPOLIS, MINNESOTA, ASSIGNORS TO GEORGE 'W. ROBINSON, TRUSTEE, OF ST, PAUL, MINNESOTA. I v

'rnrinr'nonnnnmo TRANSMISSION Application filed June 7,

The present invention relates to the transmission of programs by wire.

In a program transmitting system wherein. programs are transmitted from a central 5 oflice by means of wires, it is desirable for the subscriber to said system to have a number or programs available for reception by said subscriber.

An object of the present invention is to permit a subscriber to select any of a predetermined group of programs for reception.

In order to attain this object, there is provided, in accordance with one feature of the invention, a receiving device such as a loud speaker, placed in a subscribers home and connected by suitable conductors to a central oflice. At the central office the conductors are connected to a selector switch of a suitable type.- The contacts of the selector switch are devices.

These and other features of the invention will be more fully brought out in the following description and the accompanying drawing, wherein:

' The figure shows a schematic representation of a receiving device connected to a selector switch in accordance with the present invention.

,while the longer switch arm 7 engages the outer row of contacts 3. The mechanism of the switch A may be any of the well known I types of switches wherein an impulse from the impulsing switch causes the switch contact means to step over to a new pair of contacts. Each pair of contacts 3 may be connected to a separate program source. For example,

the first pair 8 of contacts may be connected connected to suitable program transmitting Referring to the drawing in detail, a suit-' 1926. Serial at. 114,193.

to an electric reproducing diaphragm operating upon a phonograph record, not shown,

sothat the listener may have the selection recorded upon said record re roduced by the i actuated selector sWitchA are moved to engage the first pair 8v of contacts 3, thereby causing the selection recorded upon' the pho nograph record to be reproduced by the loud speaker 1; In like manner, by actuatin the impulsing switch 2 to produce any predetermined number of impulses, the switch arms 6 and 7 may be operated to engage any desired pair of contacts, thus putting a complete series of programs within the range of selection of the subscriber.

We claim: 1

In a program distributing system wherein programs are transmitted from a central station to a place of rece tion by means of conductors, means for se ecting one ofa predetermined group of programs comprising a selector device at the central station having a plurality of'contacts adapted to be connected to a plurality of programs, areceiver at the place of reception connected to said selector device, an impulse mechanism in said line for controlling the selector device and switching means associated with and operated by said impulse mechanism for shunting out said receiver while a program 15 being selected. r

In testimony whereof we aflix our signa tures.

GEORGE K. GANN. v LAWRENCE O. PAINTER. HOWARD L. JOHNSON. PAUL L. FRYKMAN. 

